Reversing mechanism



Feb. 24, 1931. H. A. TUTTLE I REVERSING MECHANISM Filed Nov. 10-, 1928 s Sheet' s- S heet 1' ml E,

Feb. 24, 1931. H. A. TUTTLE 1,794,044

' REVERSING MECHANISM Filed Nov. 10, 1923 :5 Sheets-Sheet 2 Patented Feb. 24, 1931 sTArEs 'HENRY A. TUTTLE, OF

PATET OFFICE REVERSING MECHANISM Application filed November 10, 1928. Serial N0. 318,539.

This invention relates to reversing mecha- V vnisinsof the planetary type especially adapted although not limited. to boat propulsion. One of the objects of the present inven- 5' tion is an improved reversing gearing whereing clutch mechanism is provided to connect the driving and driven shafts directly and exclude thereversing drive. 3. 19 Another object of the invention is theprovision of a reversing gearing having internal gears on both the driving and driven shafts and reversing pinions' connecting said internal gears. combined with a clutch mechanis1n located in the forward part ofthe reversing gearing to connect the shafts positively together and exclude the gearing for forward drive.

Another obje xt of thepresent invention is the provision of a reversing gearing so arranged thatthe reversing pinion gears rotate at relatively slow speed when the gearing is set'for reverse drive. i In the usual type of reverse gearing there 25 is a considerable drag on the driven or propeller shaft when the gear is in neutral and the driving or engine shaft is rotating. This drag is olojectionable since it causes the propeller shaft to rotate and thus tends to pro- 5s the boat forwardly when. the propeller shaft issupposed to be stationary.

It is another object ofthis invention to rovide a reversing earin es eciall designed to providemeans to hold the propeller shaft; stationary when the gearing is in neutral and the propeller shaft is free from posi-.

' ti ve driving connection with the driving shaft. y

A yet further object of the the provision of a reversing gearing especially arranged for the application of a brake to a part thereof that is fixed to the propeller shaft so that the propeller shaft can be held stationary when the gear is in neutral. y

y yet further object is generally .to'improve thecenstruction and operation of re versing gearings.

Fig. 1 is alongitudinal sectional elevation through a reversing mechanism embodying 50 the invention.

gears for forward invention is i Fig. 2 is an end view of the floating pinion gear CZLIIIBL.

Fig. 3 isan end view ofthe gear carrier brake drum.

Fig. 4 is a section along line 4- 1- of Fig. 1.

Fi 5 is a section alongline 5-5 of Fig. 1.

Fig. 6 is a partial sectional elevation through the long pinion gear, taken along line G6 of Fig. 4.

Fig. 7 is a plan detail ofthc gearing of Fig.

l and illustrating especially the means for operating the reverse and neutral brakes.

Fig. 8 is an elevation ofthe spider that carries the clutch-operating levers. T he reversing mechanism here shown includes the driving or engine shaft 10 and the driven or propeller shalt 12, the shafts being A hub 14 is keyed aligned with each other. to the end of the engine shaft and has a ra-. dially outstanding flange 18 that is provided with an annular seat 20 on which an internal gear flange by bolts 2% Said hub is provided with an internal annular recess 26 in which a ball bearing 28 is received. The forward A hub 34: is received on the end ofthe orivenshaft and between the bearing and the and is keyed therein and also is held on the shaft against axial movement by engagement with the forward shoulder of said enlarged section and also. by engagement with the split collar 82; Said hub 34: constitutes a clutch plate carrier and is provided with external gear teeth 36 or other suitable means to engage a plurality of clutch plates 38. Said clutch plates are provided with internal gear teeth that are in mesh with the external gear teeth 36 so that the clutch plates are free for axialrnovement on the carrier but are con- 22 is received and is secured to said enlarged intermediate section 12a of the shaft strained for conjoint rotation therewith.

Cooperating clutch plates 40 are located nal gear teeth 41 that are in mesh with the internal gear teeth of said gear. The carrier 34 is provided with a'radial' outstanding flange 42 at its forward end which constitutes an abutment against which the clutchplates are adapted to be pressed to set the clutch and thereby to connect the driving and driven shafts directly for forward drive.

A pinion gear carrier llis dispose-d partly within the internal gear 22 and surrounds the intermediate portion 12a of the driven shaft. Said .pinion carrier consists of integrally connected and axially spaced and radially outstanding end plates 46 and 18 respectively which are rotatably mounted on ball bearings 50 carried by and movable axially on the driven shaft. A pal-ref long gears."

pinion gears 52, see especially Figs; 4, 5 and 6, are located between the 'end plates of the carrier and are 1ournalled on p1ns' 5 l supported on their ends by said end plates.

Said gears are in mesh with the internal gear 22. Short piniongears 56 are in mesh with said long pinion gears-and are ournalled on pins 58 of the gear carrier. An internal gear 60 is keyed to the driven shaft 12 at the rear of the intermediate section 12a thereof and is held against rearward movement on 64 in said shaft. Said gear is in mesh with theshort pinion gears 56. l Vith this arrangement, when the pinion gear carrier 14 is held stationary, the gearing is set for reverse drive. When the pinion carrier is released and is floating on the driven shaft and the clutch is set, the gearing is set for forward drive and the power is transmitted directlyfrom the driving shaft. to the driven shaft'withoutpassing through the pinion The pinion gearcarrier is held stationary by brake mechanism which includes a brake drum 66 that closely encircles and overlies the driving internal gear 22. Said brake drum has at the rear end thereofa pair of radially inwardly extended arms or projections 68, see especially Fig. 8, which ter minate inaxially-extended bosses 70 that are located within the internal gear and between the end plates of the pinion carrier andare received on the pins 58. beside the short pinion gears 56. Thus the brakedrum is connected posit vely with the floating pinion carrier 'and when the brake drum is held] stationary the pinion gear carrier also is held stationary. Thepinion gear carrier has a pair of opposed notches 7 2 in one of its end walls, see especially Fig. 2, which permit the passage'of thebosses '70 of the brake drum into the space between the end plates of the gear carrier so that the brake drum can be attached tothe carrier. i

The driving and driven internal gears are spaced axially to permit the arms 68 of the v are located. pivotallyconnected to pins 108 carried bv especially Fig. 8. Levers 78 are located between" said arms and are pivoted on pins 80" extended through said arms. Thrust pins 82 are slidably received in the flange of the internal gear 60 and are adapted to bear against the. rear end plate 46 of the gear carrier to move the carrier forwardly to set the clutch. Said levers have toes 84 which are brought into pressure applying relation with the rear ends of the thrust pins 82 when the levers are rotated inaclockwise direction whereby to move the gear carrier forwardly and et the clutch.

A split ring 86 is screw threaded within a cylindrical extension or drum 88 of the drivon internal gear 60 and has a frontarcuate face 90. The rear ends of the arms 76 are provided with corresponding arcuate faces 92 that areseatod on said face of the ring. The ring thus supports the spider against axial movement when the clutch is operated and, by

reason of the engaging arcuate faces, the

spider is automaticallyself-centering on the ring; The ring can be rotated within the drum 88 to compensate for wear between the clutch plates. The ring can be clamped in any set position by theclamping screw 94 that is extendedbetween the ends of the ring and servesto spread them apart. The spider is loosely received on a pin 96'carried by the internal gear 60 so that the spider is free for axial movement thereon but is constrained for conjoint rotation therewith. The construe tion' of the split ring 86 is disclosed and claimed in my copending application Serial N0. 1s0,705, filedApril 4, 1927.

The clutch operating levers 7 8 are operated by means including a sleeve 98 which is free 7 and is slidablea-Xially on the driven shaft.

The sleeve at its forward end is DI'OVlClGCl with V L l I pairs of'spaced outstanding ears 100 which have pins 102 extended therethrough on which links 104 are loosely received. Said links have open slots 106 in which said pins The outer ends of'said links are thefou terends ofsthe levers 78. When the sleeve 98 is moved rearwardly the links 10 1- are moved into a vertical positionand thus force the levers 78 outwardly and set the clutch. Then the, sleeve is' movedv in the opposit-e dire tion the clutch setting pressure is removed and the clutch plates separate by their inherent resiliency. The construction of the links 104 is also disclosed in my 00- pending application Serial No. 291,333, filed July 9,1928.

i I moved. Thezother end-f the rod 118, beyond the driven stationary when the gearmgmechainsm 1s-1n neutral.

The brake .mechanism to secure reverse drive includes a resilient brake band 114 which encirclesthe brake'druin 66 and is adaptedto be contracted .into frictionaliengagement therewith and hold it stationary. Saidbrake band is provided with a pair of spaced upstanding ears 116,:see especially' Figs. 4and 7, located at the top ofthe gearing. A rod 118 isloose ly extended through aligned passagesin said ears. A compression spring 120 encircles one endof the rod beyond oneof said ears and bears against aconically facedmember 122 that'hasa swivelled seat on said ear. A nut 1 124 is screw threadedon the end of said rod and servesas an abutment for theother end of said spring and also to vary the tension thereon- A lighterspring 126 encircles said rod betweensaid ears 116 and bears against both of said ears for the purpose of spreading the ends of the brake band apart whenthe compressional force thereon is rethe other ear, is providedwith an axially dis posed slot 128 therein. A roller 130 is located in said slot at the end of the pin and is journalled ona: pivot pin 132 carried by the rod. A second roller 184is located at the otherend of said slot and is carried on a it is apparentthatthe'rod 118 will be moved:

pin 136 that is secured in a conically faced member 138 that bears against and is selfcentered on theiother brake ear. Said lrodis provided'withopposed slots 140 in which said pivot pin 136 is loosely extended.

The brake.operatingmechanism includes a longitudinally-movable brake operating bar 142 which has anenlarged end 144' and inclined cam =faces146 extending fromthe narrow body portion to the enlarged end thereof. Said bar is adapted to bear against'both of saidrcllers 130.an d 134. i "Whenthe bar is 1 moved to the right, Fig. 7, to bring the en larged-end 144 thereof between said rollers.

outwardly thereby .to'move the endsof the brake toward eachother and tocontract the brake aboutthe brake band. When the bar is moved in the opposite direction, it isiapparent thebrake willibereleased andj the brake "will be free to expand 'by its own resiliency assisted by theaction ofthe spri1ig126. The spring 120 servesautomatically tocompens sate for the wear between the engaging surfacesof-the brake sothat adjustmentstotake up wear are not frequently needed.

The brake mechanism to hold the driven or propel-ler shafti stationary when the gear isiinneutral includes a neutral brake band 148 which encircles the outer cylindrical face 150 of the driveninternal gear fixed to the driven shaft. The neutral brake band 148. is similar in construction to the reverse I brake band 114. A rod 118a is passed through the confronting ears 116a at theends of the neutral brake band and hasa spring 120a bearing at oneiend against said rod and at the other end against one of theears of the .brakeband. A spring 126a is located on said rod between the ears of the brake band for spreading the band apart. The rod is provided with a slot in which the brake operating bar 142 is inovably received. A cam roller 132a is rotatably located in one end of the slot and a second cam roller 134a carried by the conically faced member 138a is received in the otherend and is movable axiallyof the slot. The operatingbar 142 is provided withan enlarged intermediate section 152 which is adapted to be passedbetween the rolls 132a and 134a for the purpose of contracting the brake band about the internal gear 60.

theoperating bar shown in Fig. 7, thereverse brake band 114 is shown contracted about the brake drum of the gear carrier \vherebyto set the gearing for reverse drive. The neutralbrakeband 148 is free froni engagement with the driven gear a 60. The

clutchumechanism also is in aninoperated condition. WVhen the operatingrrod 142 is moved sufiiciently to the leftto bring the intermediate enlarged portion 152 thereof between the rolls 132and 134athe reverse brake band 114 will be released and the neutral brake band 148 will be set whereby to hold the driven shaft "stationary; The :clutch HQBChELIIISDIWIll continue to remain 11111.11 unoperatedcondition. Vhen the operating bar is moved further to the left, the neutral brake band will be released and the clutch mecha nismwill be setto secure forward drive. a The bar 142 is pivotally connected to an arm 154 fixedtoithe iyoke 110 so thatit can beoperated by the ioperating handle 156 conjointly with the clutch operating mechanism. a 1

fThus, it will be seen that when the reverse brake band is setand also when the clutch mechanism is set, the neutral brake band 148 will be freebut when both the clutch and the reverse brake are free, the neutral brake will be set. l

There is a tendency for the operating rod 142 to move the brake bands 114 and 148 axially while contracting them. Means are provided herewith to prevent such axial movement. Said :means includesa plate 158 which is located between the confronting ends of both brake bands and overlies and bears uponthe brake drum 66 and 150. Saidplate In the position of the two brake bands and tracted about the drums. Said plate is pro- :vided at its ends and also intermediate its ends With opposed .circumferentially extendt ed ears 166 which overlie the-opposite sides of both brake bands at the ends thereof. Thus, said projections are in position to be engaged by and prevent axial movement of the brake bands ingeith'erdirection. Said plate is held in the aforesaid relation by a link 162 which is pivoted at its forward end on a pm 164 car *ied by the rear end of said plate and 1s alsopivoted at its rear end on the cross shaft 112, thereby supporting said plate and consequently the brake bands against axial movement ,Iclaim: I I1.- Reversing mechanism including the combination ofdriving and driven shafts, an internal gear fixed to each shaft, a floating'pinion'gear carrier-"located within said internal gears, intermeshing pinion gears carried by said carrier in mesh with said-internal-gears, brake mechanism to hold said floating gear carrier stationary to securereverse drive, and clutch mechanism located Withinv the internal gear of said driving shaft forwardly of said pinion gear carrierconnecting said .shafts directly for forward drive.

2. Reversing mechanism including the combination of driving anddriven shafts, an internal gear fixed to each shaft, a floating opinion gear'carrier located within said in- 'said 'carrierstationary-to secure reverse drive, and clutch mechanism for connecting shafts directly forforward drive, said 'clutchmechanism "including co-operating sets of clutch plates locate'dfwithin the internal gear on said drivingw shaft, some of said plates having a driving connectlon with sa d gear andlothe s of sa1d plates having a driving connecti on with said driven shaft;

4. RVGESlIlg mechanism including the combination. of driving and dr ven shafts,

gears fixed to said shafts,a floating, axially movable pinion gear carrier, intermeshing pinion gears carried bysaid'carrier meshing with said shaftigears, brake mechanism to hold'said' pinion carrier stationary to set the reversing inechanis'm for reverse drive, clutch fmechanismlocated between said shaft driving shaft internal gears connecting said driving and'driven shafts directly for forward drive,'and clutch operating mechanism including means to move said piniongear carrier axially to set the clutch mechanism. 1 V

5. Reversing mechanism including the combination of aligned driving anddriven shafts, gears fixed tosaid shafts, the driving shaft gear having a hub which'connects it with said driving shaft, afioating pinion gear carrier rotatable and axially movable on'said driven shaft, intermeshing pinion gears carried by sald carrier in mesh with said shaft gears, brake mechanism to hold said pinion gear carrier stationary to secure reverse drive, clutch mechanism surrounding said driven shaft and, located in the axial space between said drivingshaft gear hub and said pinion gear carrier arranged to connect said shafts directly for forward drive,

and clutch operating mechanism, including means to move said pinion gear carrier axially to set the clutch mechanism.

6. Reversing mechanism includingv the combination of aligned driving and driven shafts, internal gears fixed to said shafts, a floating pinion gear carrier rotatably and axially movable on said driven shaft within said internal gearsjintermeshing pinion gears carried by said carrier-meshing with said internal gears, brake mechanism to hold said pimon carrier stationary for reverse drive, clutch mechanism for connecting said shafts directly and excluding said gears for forward drive including cooperating sets of clutch plates located within said driving driving connections respectively with said gear and said driven shaft, and-clutch operating mechanism including means to move the saidpinion gear carrier axially into pressure applying relation with said clutch plates. I

. 7. Reversing mechanism including the combination of aligned driving'and driven shafts, gearing'connecting saidshafts for reverse drive including an internal gear fixed to; said driving shaft, a gear fixed to said driven-shaft, a floating-pinion gear carrier rotatable and axially movable onrsaid driven shaft, inte'rmeshing pinion gears carried bysaid carrier meshing with saidshaft gears, a clutch plate 'carrier fixed to said driven shaft within said internal gear and between said drivingshaft gear and pinion gear carrier, cooperating setsof clutch plates connected with and carried by said internal gear and clutch plate carrier respectively,: and clutch operating mechanism including means to movesaid pinion gear carrieraxially into pressure applying relation with said clutch plates. V

'8.' Reversing mechanism including the combination, of aligned driving and driven shaft internaligear and between said driving .shait and pinion gear carrier'andhaving shafts, gearing connectingsaid shafts for reverse drive including an internal gear fixed to said driving shaft, a gear fixed to said driven shaft, a floating pinion gear carrier rotatable on said driven shaft, intermeshiug pinion gears carried by said carrier in mesh with said shaft gears, brake mechanlsm to hold said pinion gear carrier stationary to set the gearing for reverse drive, clutch meclr anism connecting said shafts directly for forward drive including a clutch plate carrier located witlnn said 1nternal gear and between said driving and pinion gear carrier and fixed and movingit axially to set the clutch mechanism.

9. Reversing mechanism including aligned driving and driven shafts, an internal gear having a hub fixed to said driving shaft, a second internal gear fixed to sald driven shaft, a ball bearing forthe end of such driven shaft carriedby said hub rearwardly of said driving shaft, afioating pinion gear carrier located within sald lnternal gears having ball bearings rotatable and also axially slidable onsaid driven shaft forwardly of the driven shaft internal gear, intermeshing pinion gears carried by said carrier in mesh with said internal gears, means to hold said pinion gear carrier stationary for reverse drive, a clutch plate carrier located within said driving shaftinternal gear and fixed to said driven shaft forwardly of said pinion gear carrier, cooperating sets of clutch plates located within said drivingshaft internal gear and carried by and connected with said internal gear and sald clutch plate carrier respectively whereby to connect said shafts directly for forward drive, and clutch "operating mechanism including means to move said gear carrier axially into pressure applying engagement wlth said clutch plates. 10. Reversing mechanism including the combination of driving and driven shafts,

gearing to connect said shafts for reverse drive including internal gears fixed to said shafts, a floating pinion gear carrier located between said gears, intermeshing pinion gears carried by said carrier in mesh with said internal gears, means to hold said pinion gear carrier stationary to set the gearing for reverse drive, clutch mechanism for connectingsaid shafts directly for forward drive including cooperating sets of clutch plates located forwardly of said pinion gear carrier within the internal gear of said driving shaft and connected respectively with said internal gear and said driven shaft, and clutch operating mechanism located rearwardly of said internal gear on said driven shaft having thrust pins slidably extended through said driven shaft internal gear for moving said pinion gear carrier axially into pressure applying relation with said clutch plates.

11, R, V sing mechanism including the combination of aligned driving and driven shafts, an internal gear fixed detachably to said hub, an internal gear fixed to said driven shaft, means holding saidlatter internal gear forward movement axially of said shaft, said shaft having a reduced forward extension over which said internal gear may be removed, apinion gear carrier rotatable on said forward extension of said driven shaft, intermcshing piniongears carried by said carrier inmesh withsaid internal gears, means to hold said pinion gear carrier stationary to secure reverse drive, clutch mechanism connecting said shaft directly for forward drive including a clutch plate carrier fixed to the forward end of said driven shaft, removable means holdingsaid clutch plate carrier against axial movement thereon, co-

operating sets of clutch plates carried by said carrier and said drivingshaft internal gear respectively, and clutch operating mechamsm including means to move saidplnion gear carrier axially into pressure applying,

relation with said clutch plates.

12. Reversing, mechanism including the combination of driving and driven: shafts,

gearing connecting said shafts for forward drive including an internal gear fixed to said dr ven shaft, gearing elements connecting I said internal gear and driven shaft, clutch mechanism located forwardly of sald internal gear for connecting said shaftsifor forward drive, said internal gear having a rearward ly extended drum, a lever carrying member located within said drum, clutch operating levers carried by said member, thrust pins slidable in said internal gear and operated by said levers for setting said clutch mechanism, and means carried by said drum constituting an adjustable abutment for supportingsaid lever-carrying member against roarward axial movement.

13. Reversing mechanism including the combination of driving and driven shafts, gearing connecting said shafts for reverse drive including internal gears iii-zed to said shafts in axially spaced relation, a floating and axially movable pinion gear carrier located between said internal gears, intermeshingpinion gears carried by said carrier in mesh with said internal gears, and abrake drive including sets of clutch plates located forwardly of saidpinion gear carrier having driving connections respectively with said driving shattvinternal gear and with said driven shaft, and means to move said pinion gear carrier forwardly into pressure-applyrelation with said clutch plates.

14. Reversing mechanism including the combination of driving and driven shafts,

spaced internalfgears fixed to said sha'its, a

rotatable andaxia'lly movable gear carrier located within said internal gears having interin'eshing pinion gears which mesh'wit-h said'internai gears, said gear carrier also havar a member fixed thereto extended outwardly between said internal gears, a brake .drum fixed to said member, brake mechanism engageable with said drum to. hold said carrier stationary for reverse drive, and elutchniechanisn' connecting said shafts directly'ior forward drive including sets of clutch plates located forwardly of said pinion "gear carrier having driving connections re spectively with said, driving shaft internal gear and with said driven shaft, and means I to move said pinion gear ca rier forwardly intofpressure-applying relation with said clutch plates.

1'5; Reversing mechanism including the combination of driving and driven shafts,

gearing connecting said shafts for reverse driveincluding spaced internal gears lixed to said shafts, apinion gear carrier located within, said internal gears having spaced end plates, intermeshing pinion gears carried by said carrierin mesh with said internal gears, a brake drum external of said pinion gears having a part thereof extending inwardly into the space between said internal gears and said end plates, means connecting said part fixed to said shafts, intermeshing pinion gears in mesh with said internal gears, a

pinion gear carrier located within said internal gears and having spaced end plates, pins carried by said plates providin supports r'or said pinion'gears, a brake'druin external of said internal gears having a flange extendedinwardly of the space between internal gearsand into the space between said end plates, means including said pins securing said flange to said gear carrier,and brake mechanism engageable with said brake .tion with said pins.

drum to hold the carrier stationary for re verse drive. j

l7. Reversing mechanism including the combination of driving and driven shafts, spaced internal gears fixed to said shafts, a floating pinion gear carrier located within said internal gears and having spaced end plates, pins carried by and extended between said end plates, intermeshing pinion gears said endpiates, and a brake drum'snrrounding and carried by said carrier and having a connection which is located within the carrier and between one of said end plates and certain or" said pinion gears.

19. n1 pinion gear carrier having spaced end plates, pins carried by and extended between said end plates, pinion mounted on said pins, a brake drum surrounding said carrier carried by and having a connection with some of said pins.

20. in a reversing mechanism, a rotatable pinion gear carrier having spaced end plates, pins carried by. and extended between said end plate and a brake drum surrounding said carried by and having a connec '21. lna reversing mechanism,- a rotatable pinion gear carrier having spaced end plates,

pins carried by and extended between said end plates, short pinion gears journalled on said pins adjacent one of said endplates, and a brake drum encircling s id carrier having inwardly d ected projections which are consaid pins between said pinion gears and-said other end plate.

22. in areversing mechanism driving and driven internal gears, a rotatablereversing pinion carrier having spaced end plates, pinion gears carried by said carrier and meshing with said internal gears, a brake drum overlying said pinion gear carrier and said driving gear only having projections which are, inwardly directed rom one end thereof into said carrier, and means connecting said projections with said carrier.

23. In a reversing mechanism, a pinion gear carrier having spaced end'plates, pinion gears carried by said carrier," a brake drum surrounding said pinion gear carrier having inwardly-directed projections, one of said plates of said carrier saving notches which permit said projections to pass into the space between said end plates, and means connecting said projections with said carrier.

24. Reversing n echanism including the a reversing mechanism, a rotatable combination of driving and driven shafts, gearing connecting said shafts for reverse drive including an internal gear fixed to said driving shaft, a gear fixed to said driven shaft, rotatable pinion gear carrier'located partly within said internalgear and having internieshing pinion gears meshing vith said internal gear and said driven shaft gear, a

said internal gears, means for holdin said 3 pinion carrier stationary toset the gearing for reverse drive, and brake mechanism associated with said driven shaft internal gear for holding said gear and also said driven shaft stationary.

26. Reversing mechanism including the combination of drivingand driven shafts,

clutch mechanism connecting said-shafts for forward drive, gearing connecting said shafts for reverse driveincluding internal gears fixed to said driving and drlven shafts, a rotatable plnion carrler, intermeshing pinion gears carried by said carrier in mesh with said internal gears, means for holding said pinion carrier stationary to set the gearing for reverse drive, said driven shaft internal gear constituting a brake drum, and brake mechanism associated with said drum for holding it stationary.

V 27. Reversing mechanism including the combination of driving and driven shafts, clutch mechanism connecting said shafts for forward drive, gearing connecting said shafts for reverse drive including a brake drum for setting said gearing for reverse drive, a brake band encircling said drum, a second brake drum iocated adjacent said first brake drum and fixed to said driven shaft, and operating mechanism for both of said brake bands including an axially movable cam operating member overlying and common to both brake bands. r

28. Reversing mechanism including the combination of driving and driven shafts, clutch mechanism connecting said shafts for forward drive, gearingconnecting said shafts for reverse drive including a brake drum for setting said gearing for reverse drive, a brake band encircling said drum, a second brake drum located adjacent said first brake drum e andfixed to said driven shaft, an operating mechanism for both of said brake bands including an operating member which is longitudinally movable between said brake bands.

29. Reversing mechanism including the combination of driving and driven shafts, clutch mechanism connecting said shafts for forward drive, reversing gearing connecting said shafts for reverse drive including a brake drum associated with said gearing, a brake band encircling said brake drum and holding it stationary to set the gearing for reverse drive, means for holding said driven shaft stationary including a second brake drum fixed to said driven shaft adjacent said first brake drum, a brake band encircling said second brake drum for holding it stationary, axially movable operating means for said brake bands, and means supported against axial movement extended between both brake bands having parts that engage both of said brake bands and hold them against axial the space between said internal gears and has a connection with said pinion gear carrier, a brake band encircling said drum, said driven shaft internal gear constituting a neutral brake drum, a brake band encircling said neutral brake drum and lying beside said reverse brake band, and means to move said pinion gear carrier axially and set said brake bands one at a time.

31. Reversing mechanism including the combination of driving and driven shafts, planetary gearing connecting said shafts for reverse drive including a brake drum to hold parts of said gearin stationary, a brake band encircling said drum, a second brake drum fixed to said driven shaft arranged to hold said shaft stationary when the reversing gearing is idle, a brake band encircling said drum, axially movable operating mechanism for both of said brake bands, and means common to both of said bands arranged to hold them against axial movement caused by the operation of said operating mechanism.

32. In a reversing gearing, a brake drum arranged to hold parts of said gearing stationary to secure reverse drive, a brake band movement due to the operation of said operating mechanism including a plate having projections which overlie and engage the-op. posite ends of said brake band, and means holding said platein the aforesaid relation.

' In fiestilnony whereof, I have signed my name to this specification. I

Y HENRY A. TUTTLE. I 

